Cool. So basically it's just adding on-chain transfer capability

When buying bitcoin through RoboSats you have the ability to chose "On-Chain" as the payout method.  What RoboSats does then after the seller indicates your payment has been received is to create a reverse-submarine swap, such that the sats end up in a bitcoin transaction pays your on-chain bitcoin address that you provide.

Here's a Tweet that shows the UX for that:

> 🤖RoboSats has leveled up this weekend!⬆️
>
> Buyers can receive their Sats directly on their cold storage. 
>
> RoboSats will perform an on-the-fly reverse submarine swap for you. The fee rate will depend on the available on-chain liquidity on the platform.
>
> ![](https://i.postimg.cc/z511HFFJ/image.jpg)

https://twitter.com/RoboSats/status/1538498256400965632 [Nitter](https://nitter.at/RoboSats/status/1538498256400965632)